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Structure and functions
4
NK823x hardware
26
Building Technologies
A6V10062437_a_en
Fire Safety & Security Products
30.06.2013
Blinking (2 flashes): trouble with the I
2
C bus to I/O modules.
Blinking (3 flashes): not used
Blinking (4 flashes): trouble with the serial/network interface.
Blinking (5 flashes): trouble with DLL or RCLOCK file(s).
Blinking (6 flashes): Modbus GW trouble.
– SW trouble.
– No communication to FS20/FS720 or to the Modbus Master/Client.
– No NK8237 or FS20/FS720 registers reading (Modbus Master watchdog
expired).
On: critical/hardware fault.
Right Side LED’s
The four LED's on the right side are, from top to bottom:
Name
Function
Com1
Status Com1
Com2
Status Com2
Com3
Status Com3
Com4
Status Com4
Red: RX
Green: TX
4.2.2
Internal DIP switches
The internal DIP switches (S101) enable a download session via FTP using a default
IP address.
Internal switch
Functions
DIP switch 1
Default mode/network access: If DIP-switch 1 is ON, an FTP connection occurs
by default on the Ethernet at the default IP address 192.168.9.41.
DIP switch 2
Default mode/network access: If DIP-switch 2 is ON, an FTP connection occurs
by default on the Ethernet at the default IP address 192.168.10.41.